The Serratus Anterior Muscle

http://www.yoganatomy.com/serratus-anterior-muscle/

 Serratus Anterior – The Boxer’s Muscle!

What does Serratus Anterior mean?

Serratus anterior was named for its finger like muscular origins that look serrated. “Serratus” comes from the Latin serrare meaning “to saw”.

Anterior refers to the muscles location on the front or anterior side of the body.

Serratus is known as the boxer’s muscle because it is the strongest protractor (sending it forward) of the scapula.

This anatomical movement is primarily what allows for the whole movement seen in a punch.

Where does Serratus Anterior attach?

• Originates on the upper 8 or 9 ribs
• Inserts on the medial border or edge of the scapula
• There is a convergence of fibers on the inferior (bottom) angle of the scapula

What actions does Serratus Anterior do?

• Protraction of the scapula – brings the scapula forward on the rib cage
• Upward rotation of the scapula – Used after the humerus abducts to ninety degrees.
• Stabilizes the scapula and prevent the inner edge from “winging”.

Postures Where The Serratus Anterior Contracts

I often find that students don’t use serratus enough. I have written about it in a number of articles already that relate to Downward Dog, Headstands, Chaturanga, and Handstands.

Having said that serratus is a key stabilizer of the scapula and is how it should be used in many yoga postures.

It contracts to keep the chest from sinking through the shoulder blades.

It upwardly rotate the scapula to get the arms over the head.

Postures Where The Serratus Anterior Lengthens

In dhanurasana it is lengthened as the scapula retract (get pulled back and together).

Additional Images

Trigger Points